Littelfuse has introduced the NANO2 708 Series, a surface-mount fuse rated at 14,000 A interrupting capacity at 80 VDC—making it, according to Littelfuse, the first SMD fuse to reach that protection level. The devices are aimed at 48 VDC power architectures in AI servers, hyperscale data center infrastructure, and high-density power distribution.
As 48V bus architectures have replaced 12V distributed power in AI server deployments, fault-current exposure at the board level has grown substantially. Interrupting ratings high enough to safely clear those faults were previously only available in through-hole or bolt-down fuses—physically larger components that require manual installation and can’t be run through automated pick-and-place assembly. The 708 Series fits a standard SMD footprint and ships in tape-and-reel for automated assembly, with no manual handling required.
Current rating range is 60A to 200A. Specific applications include PDUs, power shelves, battery backup units, and PSUs in data center environments. The 80 VDC voltage rating provides margin above the 48V bus for transient conditions.
The 708 Series joins Littelfuse’s broader 48V data center fuse portfolio alongside the 456, 871, and 881 Series. Tape-and-reel packaging is available in quantities of 500 through Littelfuse distributors.
“We’re giving designers using legacy through-hole or bolt-down solutions a path to transition to surface-mount technology,” said Daniel Wang, Senior Director of Product Management at Littelfuse. “That shift enables automated manufacturing, improves productivity, and reduces overall system cost.”
Source: Littelfuse
